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<h2><span class="refentrytitle">Function check_exit_code</span></h2>
<p>boost::process::v2::check_exit_code</p>
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<h2 class="refsynopsisdiv-title">Synopsis</h2>
<div class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../boost_process/v2.html#doxygen.exit__code_8hpp" title="Header &lt;boost/process/v2/exit_code.hpp&gt;">boost/process/v2/exit_code.hpp</a>&gt;

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<span class="identifier">error_code</span> <span class="identifier">check_exit_code</span><span class="special">(</span><span class="identifier">error_code</span> <span class="special">&amp;</span> ec<span class="special">,</span> <span class="identifier">native_exit_code_type</span> native_code<span class="special">,</span> 
                           <span class="keyword">const</span> <span class="identifier">error_category</span> <span class="special">&amp;</span> category <span class="special">=</span> <span class="identifier">error</span><span class="special">::</span><span class="identifier">get_exit_code_category</span><span class="special">(</span><span class="special">)</span><span class="special">)</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="id-1.3.30.5.8.8.3.4"></a><h2>Description</h2>
<p>Helper to subsume an exit-code into an error_code if there's no actual error isn't set. </p>
<pre class="programlisting"><a class="link" href="structboost_1_1process_1_1v2_1_1basic__process.html" title="Struct template basic_process"><span class="identifier">process</span></a> <span class="identifier">proc</span><span class="special">{</span><span class="identifier">ctx</span><span class="special">,</span> <span class="string">"exit"</span><span class="special">,</span> <span class="special">{</span><span class="string">"1"</span><span class="special">}</span><span class="special">}</span><span class="special">;</span>

<span class="identifier">proc</span><span class="special">.</span><a class="link" href="structboost_1_1process_1_1v2_1_1basic__process.html#doxygen.structboost_1_1process_1_1v2_1_1basic__process_1a3ab2d8a8dfb6b16447be94b0f30fd743"><span class="identifier">async_wait</span></a><span class="special">(</span>
    <span class="identifier">asio</span><span class="special">::</span><span class="identifier">deferred</span><span class="special">(</span>
     <span class="special">[</span><span class="special">&amp;</span><span class="identifier">proc</span><span class="special">]</span><span class="special">(</span><span class="identifier">error_code</span> <span class="identifier">ec</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span>
     <span class="special">{</span>
       <span class="keyword">return</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">deferred</span><span class="special">.</span><span class="identifier">values</span><span class="special">(</span>
                 <span class="identifier">check_exit_code</span><span class="special">(</span><span class="identifier">ec</span><span class="special">,</span> <span class="identifier">proc</span><span class="special">.</span><span class="identifier">native_exit_code</span><span class="special">(</span><span class="special">)</span><span class="special">)</span>
             <span class="special">)</span><span class="special">;</span>

   <span class="special">[</span><span class="special">]</span><span class="special">(</span><span class="identifier">error_code</span> <span class="identifier">ec</span><span class="special">)</span>
   <span class="special">{</span>
     <span class="identifier">assert</span><span class="special">(</span><span class="identifier">ec</span><span class="special">.</span><span class="identifier">value</span><span class="special">(</span><span class="special">)</span> <span class="special">==</span> <span class="number">10</span><span class="special">)</span><span class="special">;</span>
     <span class="identifier">assert</span><span class="special">(</span><span class="identifier">ec</span><span class="special">.</span><span class="identifier">category</span><span class="special">(</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">error</span><span class="special">::</span><span class="identifier">get_exit_code_category</span><span class="special">(</span><span class="special">)</span><span class="special">)</span><span class="special">;</span>
   <span class="special">}</span><span class="special">)</span><span class="special">)</span><span class="special">;</span>
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